<template>
  <div class="login-container">
    <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" auto-complete="on"
             label-position="left"
    >

      <div class="title-container">
        <h3 class="title">登录</h3>
      </div>

      <el-form-item prop="account">
        <span class="svg-container">
          <svg-icon icon-class="user"/>
        </span>
        <el-input
          ref="username"
          v-model="loginForm.account"
          placeholder="账号"
          name="account"
          type="text"
          tabindex="1"
          auto-complete="on"
        />
      </el-form-item>

      <el-form-item prop="password">
        <span class="svg-container">
          <svg-icon icon-class="password"/>
        </span>
        <el-input
          :key="passwordType"
          ref="password"
          v-model="loginForm.password"
          :type="passwordType"
          placeholder="密码"
          name="password"
          tabindex="2"
          auto-complete="on"
          @keyup.enter.native="handleLogin"
        />
        <span class="show-pwd" @click="showPwd">
          <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'"/>
        </span>
      </el-form-item>

      <el-button :loading="loading" type="primary" style="width:100%;margin-bottom:30px;"
                 @click.native.prevent="handleLogin"
      >登录
      </el-button>

      <!--      <div class="tips">-->
      <!--        <span style="margin-right:20px;">username: admin</span>-->
      <!--        <span> password: any</span>-->
      <!--      </div>-->

    </el-form>
  </div>
</template>

<script>
import * as types from '@/store/types'
import {validUsername} from '@/utils/validate'
import {login} from '@/apis/user'

export default {
  name: 'Login',
  data() {
    const validateAccount = (rule, value, callback) => {
      if (!validUsername(value)) {
        callback(new Error('请输入账号'))
      } else {
        callback()
      }
    }
    const validatePassword = (rule, value, callback) => {
      if (value.length < 6) {
        callback(new Error('密码不小于6位'))
      } else {
        callback()
      }
    }
    return {
      loginForm: {
        account: '',
        password: ''
      },
      loginRules: {
        account: [{required: true, trigger: 'blur', validator: validateAccount}],
        password: [{required: true, trigger: 'blur', validator: validatePassword}]
      },
      loading: false,
      passwordType: 'password',
      redirect: undefined
    }
  },

  // watch: {
  //   $route: {
  //     handler: function(route) {
  //       this.redirect = route.query && route.query.redirect
  //     },
  //     immediate: true
  //   }
  // },

  methods: {

    // 点击展示密码按钮，通过控制passwordType属性控制展示/隐藏密码
    showPwd() {
      this.passwordType = this.passwordType === 'password' ? '' : 'password'
      this.$nextTick(() => {
        this.$refs.password.focus()
      })
    },

    // 调登录接口
    handleLogin() {
      this.$refs.loginForm.validate(valid => {
        if (valid) {
          this.loading = true
          login({'account': this.loginForm.account, 'password': this.loginForm.password}).then((response) => {
            if (this.showMessage(this, response)) {
              // 存储状态
              this.$store.commit(types.token, response.data.token)
              this.$store.commit(types.roles, response.data.role_id)
              this.$store.commit(types.userName, response.data.name)
              // 重定向到指定路由
              let redirect = this.$route.query.redirect || '/'
              // let redirectPath = redirect.slice(redirect.indexOf('=') + 1)
              // console.log(`切片后的路由: ${redirectPath}`)
              // console.log(`重定向路由: ${redirect}`)
              // this.$router.push({ path: redirectPath })  // 重定向到指定路由
              this.$router.push({path: redirect.slice(redirect.indexOf('=') + 1)})  // 重定向到指定路由
            }
          })
          this.loading = false
        } else {
          this.$message.error('数据校验不通过，请确认')
        }
      })
    }
  },

  mounted() {

    // 用户名和密码输入框都为空的时候，自动聚焦到用户名输入框
    if (this.loginForm.username === '' && this.loginForm.password === '') {
      this.$refs.username.focus()
    }
  }
}
</script>

<style lang="scss">
/* 修复input 背景不协调 和光标变色 */
/* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

$bg: #283443;
$light_gray: #fff;
$cursor: #fff;

@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
  .login-container .el-input input {
    color: $cursor;
  }
}

/* reset element-ui css */
.login-container {
  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;

    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      caret-color: $cursor;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: $cursor !important;
      }
    }
  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
}
</style>

<style lang="scss" scoped>
$bg: #2d3a4b;
$dark_gray: #889aa4;
$light_gray: #eee;

.login-container {
  min-height: 100%;
  width: 100%;
  background-color: $bg;
  overflow: hidden;

  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 160px 35px 0;
    margin: 0 auto;
    overflow: hidden;
  }

  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;

    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }

  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }

  .title-container {
    position: relative;

    .title {
      font-size: 26px;
      color: $light_gray;
      margin: 0px auto 40px auto;
      text-align: center;
      font-weight: bold;
    }
  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }
}
</style>
